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Finding the Fourth Proportional to 389,998.71, 584,568.71 and 255,007.11

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Solution

The fourth proportional to 389,998.71, 584,568.71 and 255,007.11 is: 382,229.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,998.71 : 584,568.71 = 255,007.11 : x
  2. Step 2: Convert to fraction form
    389,998.71/584,568.71 = 255,007.11/x
  3. Step 3: Cross multiply
    389,998.71x = 584,568.71 × 255,007.11
  4. Step 4: Simplify right side
    389,998.71x = 149,069,177,333.53
  5. Step 5: Solve for x
    x = 149,069,177,333.53/389,998.71
  6. Step 6: Final answer
    x = 382,229.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.